docs: def startDataStoreMachine(self, dataStoreItemName, machineName):
          """
          Starts the database instance running on the Data Store machine.
  
          Inputs:
             dataStoreItemName - name of the item to start
             machineName - name of the machine to start on
          """
          url = self._url + "/items/enterpriseDatabases/%s/machines/%s/start" % (dataStoreItemName, machineName)
          params = {
              "f": "json"
          }
          return self._post(url=url, param_dict=params,
                               securityHandler=self._securityHandler,
                               proxy_url=self._proxy_url,
                               proxy_port=self._proxy_port)